Spectacles or other vision-glasses.



- s. B. MILLS SPECTACLESOR OTHER WSION GLASSES. APPLICATION FILED JUNE 3/1916.

Patented Nov 28, 1916.

- UNITED STATES PATENT orrron.

suns B. MILLS, or BALTIMORE, MARYLAND.

SPECTACLES OR OTHER VISION-GLASSES,

To all whom it may concern B. MILLS, a residln at Baltimore, inthe State of Maryland, ave

invented certain new and useful Improvements in Spectacles or other Vision-Glasses, of which the followingis a specification.

This invention relates to spectacles or other similar vision glasses.

.-I have found from experience and 011-1 servation that there are many ersons such as draftsmen, mechanics, an gaged on the work of largev structures, who require eye-glasses or spectacles thatwill provide two near ranges of vision, and often require three ranges, such as a near or reading, a distance, and an intermediate range. As an example, a draftsman working from a model or machine located: four, five or six feet from his drawing board, may need a lens for the nearest or'reading distance which lens however is not suitable for viewing the model at a distance: of saysix'feet,

and his distance lens 'isi'ju'stn s unsuitable eater distance than six feet. To meet" ese conditions I provide an improved-eyeglass or spectacles wherein'two different near fields I vention is illustrated in the of vision and also a areall available. H

One object of the invention'ictli'erefore is to provide an improved structure in' spectacles or eye-glasses, that shall combine a pair of bifocal vision lenses, a suitable nosedi'stauce field o'f vision bridge retaining the two lenses of said pair in a fixed relation to said bridge, and two movable lenseseach having a like focus but which may be either plus or minus relative to the near focus of thesaid bifocal lenses, and each movable lens sustained at the outer edge of one of said bifocal lenses and adapted. to be moved in front of the same so as to covr only. the near focus part thereof whereby a persons eyes may have a view through either the nearest focus or through the most distant, focus -f the uncoveredpart, or through the intermediate focus produced by the movable lens covering the reading part of the bifocal.

One form of embodiment of this in accompanying drawing, in which,- u

Figure 1, is a perspective view showing one form of the improved spectacles. Fig. 2, is a top plan view on a larger scale than is used in Fig. 1, and showing two mov- Application filed June 3,

others en? I Specification of Letters Patent.

Patented Nov. 28, 1916. 1916. Serial No. 101,450.

able lenses shifted from their outside position seen in Fig. 1, to a position in front of the fixed lenses. Fig. 3, is a view on a larger scale than used in Fig. 2, and shows a movable lens positioned in front of a fixed lens as at the left side of Fig. 2, the fixed lens' being in section. Fig. 4;, is 'a view of the same parts seen in Fig. 3, but showing the movable lens positioned parallel with the temple-bars, the-fixed lens being in section. Fig. 5,.is a. side view of one of the swinging links which in this case connects lens, with one of the movable lenses, and 'which link is also connected with the pintle of a temple-bar, the lenses in this figure being broken to lessen the space required out 0 drawing paper.

Referring now to the drawings and to the reference numerals marked thereon, the numeral 6, designates two bows or rims which 15. Each bow or rim 6, has a lens that always remains in fixed relation to the nosebridge.

The outermost end of each rim or bow 6, is split as usual and the two split parts 7, are secured together by a screw- 8; in the case of spectacles the end of each temple-bar 9, has the usual position between said two split parts 7, at a point beyond said screw 8, and another screw 10, connects I the temple-bar with the two splitparts and serves as a pivot for the temple-bar.

The construction just described is old. 4 I employ at each end of the spectacle frame, designated 6, l5 and 7, a movable lens 11, the movement being permitted by a suitable hinge; these hinged lenses when are connected by the familiar nose-bridge one end ofthe frame containing a fixed turned back-are positioned on the outer side of the ,templabars 9, but when in use are positioned in front so as to cover the lower r half of the fixed lenses, the present instance, 12,-one at the outer end of each fixed lens, and each link has one of its ends jointed to said movable lens 11 by a screw 13, and its other. end is jointed on the screw 10, which also serves as a pivot for connecting the temple-bar 9, with the split art 7, that I also provide, in

two swinging links,

is at tlc outermost end of each ow or rim' 6, that contains a fixed lens. These swinging links are desirablebecause they afi'ord freedom of movement to the movable lenses 11, when taking their two positions; but ther forms of oints may be employed.

- namely a near -bifocals,

The-vision lenses which are fixed atopposite sides of the nose-brid e 15, are of the type known as bifocal an m y ovalshaped or other shape. That thd fixed lenses are bifocals, is indicated in Fig; 1, by the central lines 16, extending orizontally across the lenses; the upper lens 17, is the distance and the lower lens 18, the reading. Any other known form of used.

The focus be either a plus or a minus relative to e fixed lenses, and said movable lens cons sts-q: of a glass whose lower edge the same shape as the lens that has fixe the nose-bridge, its top edge however is straight and thereby the movable lens when swung in front of said fixed lenses will cover only the lower or reading part of the bifocal lens and by this combination of lenses 11 and 18, produce a third focus that is intermediate in distance of the upper lens 1 and the lowerlens 18. It will. thus be un derstood the fixed lenses are bifocals and the movable lenses 11, have a size and shape to cover only one field of vision of the fixed thereby the-wearer of the improved have three fields of vision, field of vision, a distance and an intermediate field of vision available for his use. It will also be understood this improvement may be embodied so that the lenses shall be set in rims, or where all the vision glasses are rimless, as I have heretofore embodied this improvement both ways. I have also successfully embodied the improvement with jointed arts without including the swinging links.

The inventive idea herein disclosed is to provide vision glasses that will combine an embody a pair 0 bifocal lenses, and a pair of hinged lenses which have a difieient focus from either foci of the said bifocals, and said hinged lenses so arranged and constructed that when moved to the viewing position they will overlap and coact with only a part of the bifocals, to wit, either part that produces one focus of the two foci of said bifocals, and thereby produce a third glasses will field of vision,

bifocal may be of each movable lens 11, may

relation to a bridge-piece, of

focus available for the eyes of a person using such vision gla secs. Having described my invention what I with respect to said nose bridge-piece, said two fields of vision, fixed lens and ground to modify field of vision of the fixed lenses-said modibeing movable so as to cover said fixed lenses, provide for the a distance field of vision, and an intermediate field of vision. Q. In an eyeglass the combination wit a pair of fixed lenses rigidly attached to said bridge-piece and ground to provide tying lenses only one field of vision of whereby the said eyeglases wearer a near eld of vision,

two fields of vision; temple-bars pivotally mounted at the outer ends of the fixed lenses, and lenses pivotally sustained from each temple-bar mounting an movable from a position substantially ara 101 with and where they cover one field only of the fixed lenses to a position substantially parallel with the temple-bars whereby to provide a near field of vision, a distance field of vision and an intermediate field of vision for the wearer.

3. In vision glasses of the kind described, the combination with a nose bridge-piece, pair of bifocal lenses in fixed relation to the said nose brid -piece; a lens hing adjacent the outer ge of each bifocal lens and having a different focus from either foci of the said bifocal lenses, said hinge lenses when swung into position coaet with and modify said bifocals, intermediate wearer. v

In testimony whereof I aflix' my signature in the presence of two witnesses.

snlas B. MILLS.

focus lVitnesscs CHAS. B. MANN, Ban'rna K. Wanna. 

